CN109482140A - The preparation method and application of aluminium pillared montmorillonite load Na-Nb compound adsorbent - Google Patents
The preparation method and application of aluminium pillared montmorillonite load Na-Nb compound adsorbent Download PDFInfo
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- CN109482140A CN109482140A CN201811576267.XA CN201811576267A CN109482140A CN 109482140 A CN109482140 A CN 109482140A CN 201811576267 A CN201811576267 A CN 201811576267A CN 109482140 A CN109482140 A CN 109482140A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Abstract
The present invention provides the preparation method and application of aluminium pillared montmorillonite load Na-Nb compound adsorbent.(the 200m with high-specific surface area is prepared first2/ g~300m2/ g) aluminium pillared montmorillonite carrier, the Na-Nb compound adsorbent that method prepares the load of aluminium pillared montmorillonite is then rotated by sodium nitrate and niobium oxalate mixed solution and aluminium pillared montmorillonite.The present invention is in wide temperature (50 DEG C~200 DEG C) range, to CO2(concentration is 5vl.%~15vl.%) and N2The mixed gas adsorption capacity with higher of (concentration is 85vl.%~95vl.%).Adsorbent specific surface area with higher of the present invention and preferable thermal stability.
Description
Technical field
The aluminium pillared montmorillonite that the present invention relates to a kind of for adsorbing carbon dioxide loads the preparation side of the compound vapor of Na-Nb
Method and its under cryogenic application of CO absorption 2.
Background technique
Due to carbon dioxide (CO in atmosphere2) concentration persistently rises, bring in terms of weather, environment and ecology
Catastrophic consequence, and long-range shadow will be generated to therefore also exciting more and more people to carbon emission reduction technical research
Interest.Even to this day, China CO2Emission source still mostly come from the use of fossil energy, although such as solar energy, tide
The renewable energy technologies such as energy, water energy, wind energy have obtained enough attention and have had to be obviously improved.But in many decades even
In the longer time, the rapid growth of China's industry, rapid development of economy all be unable to do without primary based on fossil energy
The energy.In order to realize quickly control and reduce CO on a large scale2The purpose of discharge, for CO2Discharge is concentrated, discharge amount is big
The further exploitation of the carbon capture technology of thermal power plant has been very urgent with research.Although current nearly all industrialized carbon
Trapping technique is all by using the chemical absorption method of the liquid alkalines solution such as hydramine, Amine Solutions, and it is by continuous
Improving has had good achievement with perfect, but still has higher cost, high equipment rate of corrosion, solvent volatilization to easily cause
Secondary pollution problems exist.And recently as the research of novel solid adsorbent, lower regeneration energy consumption, low environment at
Originally and the solid absorption technology without equipment etching problem has shown good application prospect.Solid absorbent common in early days is such as
The inorganic porous materials such as zeolite, molecular sieve, active carbon are mostly physical absorptions, rely primarily on high-specific surface area to realize high adsorption capacity
Purpose, be conducive to the promotion for inhaling rigid ability under high pressure and low temperature, and its regeneration is easy, energy consumption is lower.But in practical flue gas
In, because of CO2Divide low, and N2The presence meeting of equal gases and CO2There is competitive Adsorption, so as to cause the practical suction of such adsorbent
Attached ability, which is had a greatly reduced quality, is dfficult to apply to reality.
In recent years, have low economic cost, less energy consumption, carrying capacity of environment low in terms of absorption due to column clay (PILC),
The features such as being not likely to produce secondary pollution has been increasingly becoming the hot spot of society research.The natural minerals such as montmorillonite are because of its unique property
Matter (such as: selective absorption and surface modification power) and be concerned.Clay is due to its abundant, high mechanical strength and good warm
Stability and be widely used as brick and insulating materials.Researcher has studied the property of montmorillonite, and discovery clay also contains weak base
Characteristic and ion exchange property can easily attract CO2Gas.By forming weak Van-der-Waals power and fixed CO2
Molecule interacts.Therefore, montmorillonite may be used as potential CO2Adsorbent.This patent aluminium pillared montmorillonite
For carrier, Al-PILC is prepared by rotary evaporation and loads Na and Nb compound-type adsorbent, at low ambient temperatures (50 DEG C~
200 DEG C) to CO2With preferable adsorption capacity.The implementation of this project obtains: project of national nature science fund project (number:
21277008；20777005)；Beijing Natural Science Fund In The Light (number: 8082008)；State key research and development plan
(No.2017YFC0209905) research contents of subsidy and these projects.
Summary of the invention
The object of the present invention is to provide the preparations and its use of a kind of aluminium pillared montmorillonite load Na and Nb dual element adsorbent
In CO absorption2.The BET specific surface area volume of montmorillonite is respectively 48m2The BET of the aluminium pillared montmorillonite of/g, Na-Nb load compares table
Area increases very big, specific surface area are as follows: 213m compared with montmorillonite original soil2/g.Provided adsorbent can be in lower reaction
At temperature (50 DEG C~200 DEG C), to CO2Adsorbance (adsorbance: 7~10.5wt%) with higher.This adsorbent prepares work
Skill is simple, and raw material are widely present in nature.
The present invention provides a kind of for CO absorption2Aluminium pillared montmorillonite load Na and Nb compound adsorbent preparation side
Method:
(1) by the H of natural smectite and 1.2~1.8mol/L2SO4Solution stirring in water bath 4~6 hours at 60-70 DEG C,
Wherein montmorillonite and H2SO4The ratio of solution is 1g:10ml, the montmorillonite filtration washing after acidification to no SO4 2-Until (use
BaCl2Solution is examined), filtered sample 120 DEG C of dry 6h in drying box, ground 80 mesh sieve of mistake of sample after drying
It is modified montmorillonite used up to acid.Configure the AlCl of 0.1~0.3mol/L3Aqueous solution, by the NaOH solution of 0.1~0.3mol/L, with
The speed of 1mL/min is added drop-wise in above-mentioned solution, [OH-]/[Al3+] (molar ratio)=2~3,50~70 DEG C of temperature holding, then
3~6 hours are stirred, resulting suspension aged at room temperature 12~24 hours obtains aluminium column liquid.By above-mentioned acidified modified montmorillonite
It is added in deionized water according to a certain percentage and acidifying montmorillonite suspension slurry is made, acidifying montmorillonite: deionized water (quality
Than)=1:40~80.The above aluminium column liquid is added dropwise to dropwise in acidifying montmorillonite suspension slurry, wherein [Al3+]: acidification is covered de-
Stone=4~10mmol:1g keep 60~70 DEG C of temperature to stir 10~16 hours, aged at room temperature 12~24 hours, 100~120 DEG C
Drying and grinding sieving, then puts it into Muffle furnace, rises to 300~450 DEG C with 1~2 DEG C/min heating rate, keeps this temperature
Section calcining 1~4 hour, gained sample was aluminium pillared montmorillonite.0.019mol/L is added in aluminium pillared montmorillonite made above
In~0.021mol/L sodium nitrate and 0.019mol/L~0.021mol/L niobium oxalate mixed solution, 60~75 DEG C of 1~4h of stirring,
Wherein the load capacity of Na is 1~15wt%, and the load capacity of Nb is 0.1~1wt%, and rotary evaporated to dryness is dry, and 100~120 DEG C dry
Dry 12~for 24 hours, the compound suction of support type Na/Al-PILC, Nb/Al-PILC and Na-Nb/Al-PILC is made in 400 DEG C of 1~4h of roasting
Attached dose.
(2) a certain amount of adsorbent is placed in thermogravimetric instrument, is passed through CO by adsorbent of the present invention2(concentration 5vl.%
~15vl.%) and N2The gaseous mixture of (concentration is 85vl.%~95vl.%), reaction temperature is 50 DEG C~200 DEG C, to gaseous mixture
Body is adsorbed, and detects adsorbent to CO by mass change2Attached amount.This adsorbent suction with higher under the above conditions
Attached ability (adsorbance: 7~10.5wt%).
Detailed description of the invention
Fig. 1 is 0.5Nb/Al-PILC, 5Na/Al-PILC, 0.2Nb-5Na/ prepared by the embodiment of the present invention 1,2,3 and 4
The XRD diagram of Al-PILC, 0.5Nb-7Na/Al-PILC adsorbent.
Fig. 2 is 0.5Nb/Al-PILC, 5Na/Al-PILC, 0.2Nb-5Na/ prepared by the embodiment of the present invention 1,2,3 and 4
The N of Al-PILC, 0.5Nb-7Na/Al-PILC adsorbent2Absorption/desorption figure.
Fig. 3 is the TG-DTA analysis of 0.2Nb-5Na/Al-PILC adsorbent prepared by the embodiment of the present invention 1,2,3 and 4
Figure.
Fig. 4 is 0.5Nb/Al-PILC, 5Na/Al-PILC, 0.2Nb-5Na/ prepared by the embodiment of the present invention 1,2,3 and 4
Al-PILC, 0.5Nb-7Na/Al-PILC adsorbent are in 150 DEG C of absorption 10%CO2Gaseous mixture 2 hours absorption figures.
Specific embodiment
Embodiment 1
(1) by the H of natural smectite and 1.2mol/L2SO4Solution stirring in water bath 4 hours at 60 DEG C, wherein montmorillonite with
H2SO4The ratio of solution is 1g:10ml, the montmorillonite filtration washing after acidification to no SO4 2-Until (use BaCl2Solution is examined),
Filtered sample 120 DEG C of dry 6h in drying box, ground 80 mesh sieve of mistake of sample after drying take off up to modified cover of acid
Stone.Configure the AlCl of 0.15mol/L3The NaOH solution of 0.1mol/L is kept [OH by solution-]/[Al3+] (molar ratio)=2,
It is added drop-wise in above-mentioned solution with the speed of 1mL/min, temperature is kept for 60 DEG C, is subsequently agitated for 3 hours, resulting suspension room temperature
Aging 12 hours, obtain aluminium column liquid.Above-mentioned acidified modified montmorillonite is added in deionized water according to a certain percentage, acid is made
Change montmorillonite suspension slurry, acidifying montmorillonite: deionized water (mass ratio)=1:40.The above aluminium column liquid is added dropwise to acid dropwise
Change in montmorillonite suspension slurry, wherein [Al3+]: acidifying montmorillonite=4mmol:1g keeps 60 DEG C of temperature to stir 12 hours, room temperature
Aging 12 hours, 100 DEG C of drying and grinding sievings then put it into Muffle furnace, rise to 300 DEG C with 2 DEG C/min heating rate,
Keep this temperature section calcining 1 hour, gained sample is Al-PILC.Sodium nitrate is molten in deionized water, and being made into concentration is
0.019mol/L sodium nitrate solution loads aluminium pillared montmorillonite mass ratio (Na wt%=5wt%) by Na, calculates gained or more
The sodium nitrate solution volume of concentration is added in the above-mentioned aluminium pillared montmorillonite of 4g, is slurried presoma, 60 DEG C of stirring 1h, rotation
Be evaporated to drying, 100 DEG C drying 12 hours, 400 DEG C of roasting 1h, support type Na/Al-PILC compound adsorbent is made.
(2) a certain amount of adsorbent is placed in thermogravimetric instrument, is passed through CO by adsorbent of the present invention2(concentration is
10vl.%) and N2The gaseous mixture of (concentration 90vl.%), reaction temperature are 150 DEG C, adsorb to mixed gas, pass through matter
Amount variation detection adsorbent is to CO2Attached amount.This adsorbent adsorption capacity with higher under the above conditions.
Embodiment 2
(1) by the H of natural smectite and 1.4mol/L2SO4Solution stirring in water bath 4 hours at 63 DEG C, wherein montmorillonite with
H2SO4The ratio of solution is 1g:10ml, the montmorillonite filtration washing after acidification to no SO4 2-Until (use BaCl2Solution is examined),
Filtered sample 120 DEG C of dry 6h in drying box, ground 80 mesh sieve of mistake of sample after drying take off up to modified cover of acid
Stone.Configure the AlCl of 0.15mol/L3The NaOH solution of 0.15mol/L is kept [OH by solution-]/[Al3+] (molar ratio)=
2.3, it is added drop-wise in above-mentioned solution with the speed of 1mL/min, temperature is kept for 65 DEG C, is subsequently agitated for 4 hours, resulting suspension
Aged at room temperature 16 hours, obtain aluminium column liquid.Above-mentioned acidified modified montmorillonite is added in deionized water according to a certain percentage and is made
At acidifying montmorillonite suspension slurry, acidifying montmorillonite: deionized water (mass ratio)=1:50.The above aluminium column liquid is added dropwise dropwise
Into acidifying montmorillonite suspension slurry, wherein [Al3+]: acidifying montmorillonite=6mmol:1g keeps 63 DEG C of temperature to stir 12 hours,
Aged at room temperature 14 hours, 110 DEG C of drying and grinding sievings were then put it into Muffle furnace, are risen to 2 DEG C/min heating rate
350 DEG C, keep this temperature section calcining 2 hours, gained sample is Al-PILC.Niobium oxalate is molten in deionized water, it is made into concentration
For 0.019mol/L niobium oxalate solution, aluminium pillared montmorillonite mass ratio (Nb wt%=0.5wt%) is loaded by Nb, calculates gained
The niobium oxalate solution volume of concentrations above is added in the above-mentioned aluminium pillared montmorillonite of 4g, is slurried presoma, 65 DEG C of stirring 2h,
Rotary evaporated to dryness is dry, 105 DEG C drying 14 hours, 400 DEG C of roasting 2h, be made support type Nb/Al-PILC compound adsorbent.
(2) a certain amount of adsorbent is placed in thermogravimetric instrument, is passed through CO by adsorbent of the present invention2(concentration is
10vl.%) and N2The gaseous mixture of (concentration 90vl.%), reaction temperature are 150 DEG C, adsorb to mixed gas, pass through matter
Amount variation detection adsorbent is to CO2Attached amount.This adsorbent adsorption capacity with higher under the above conditions.
Embodiment 3
(1) by the H of natural smectite and 1.6mol/L2SO4Solution stirring in water bath 5 hours at 66 DEG C, wherein montmorillonite with
H2SO4The ratio of solution is 1g:10ml, the montmorillonite filtration washing after acidification to no SO4 2-Until (use BaCl2Solution is examined),
Filtered sample 120 DEG C of dry 6h in drying box, ground 80 mesh sieve of mistake of sample after drying take off up to modified cover of acid
Stone.Configure the AlCl of 0.2mol/L3The NaOH solution of 0.2mol/L is kept [OH by solution-]/[Al3+] (molar ratio)=2.6,
It is added drop-wise in above-mentioned solution with the speed of 1mL/min, temperature is kept for 68 DEG C, is subsequently agitated for 5 hours, resulting suspension room temperature
Aging 16 hours, obtain aluminium column liquid.Above-mentioned acidified modified montmorillonite is added in deionized water according to a certain percentage, acid is made
Change montmorillonite suspension slurry, acidifying montmorillonite: deionized water (mass ratio)=1:60.The above aluminium column liquid is added dropwise to acid dropwise
Change in montmorillonite suspension slurry, wherein [Al3+]: acidifying montmorillonite=8mmol:1g keeps 66 DEG C of temperature to stir 14 hours, room temperature
Aging 16 hours, 120 DEG C of drying and grinding sievings then put it into Muffle furnace, rise to 400 DEG C with 2 DEG C/min heating rate,
Keep this temperature section calcining 3 hours, gained sample is Al-PILC.Sodium nitrate and niobium oxalate is molten in deionized water, it is made into dense
Degree is 0.020mol/L sodium nitrate and 0.020mol/L niobium oxalate solution, loads aluminium pillared montmorillonite mass ratio (Na wt% by Na
=5wt%), aluminium pillared montmorillonite mass ratio (Nb wt%=0.2wt%) is loaded by Nb, calculates the nitric acid of gained concentrations above
Sodium solution and niobium oxalate solution are added in the above-mentioned aluminium pillared montmorillonite of 4g, are slurried presoma, 70 DEG C of stirring 3h, and rotation is steamed
Be sent to drying, 110 DEG C drying 16 hours, 400 DEG C of roasting 3h, support type Na-Nb/Al-PILC compound adsorbent is made.
(2) a certain amount of adsorbent is placed in thermogravimetric instrument, is passed through CO by adsorbent of the present invention2(concentration is
10vl.%) and N2The gaseous mixture of (concentration 90vl.%), reaction temperature are 150 DEG C, adsorb to mixed gas, pass through matter
Amount variation detection adsorbent is to CO2Attached amount.This adsorbent adsorption capacity with higher under the above conditions.
Embodiment 4
(1) by the H of natural smectite and 1.8mol/L2SO4Solution stirring in water bath 4 hours at 70 DEG C, wherein montmorillonite with
H2SO4The ratio of solution is 1g:10ml, the montmorillonite filtration washing after acidification to no SO4 2-Until (use BaCl2Solution is examined),
Filtered sample 120 DEG C of dry 6h in drying box, ground 80 mesh sieve of mistake of sample after drying take off up to modified cover of acid
Stone.Configure the AlCl of 0.25mol/L3The NaOH solution of 0.25mol/L is kept [OH by solution-]/[Al3+] (molar ratio)=3,
It is added drop-wise in above-mentioned solution with the speed of 1mL/min, temperature is kept for 70 DEG C, is subsequently agitated for 6 hours, resulting suspension room temperature
Aging 20 hours, obtain aluminium column liquid.Above-mentioned acidified modified montmorillonite is added in deionized water according to a certain percentage, acid is made
Change montmorillonite suspension slurry, acidifying montmorillonite: deionized water (mass ratio)=1:80.The above aluminium column liquid is added dropwise to acid dropwise
Change in montmorillonite suspension slurry, wherein [Al3+]: acidifying montmorillonite=10mmol:1g keeps 10 DEG C of temperature to stir 16 hours, room
Warm aging 24 hours, 120 DEG C of drying and grinding sievings, then puts it into Muffle furnace, rises to 450 with 2 DEG C/min heating rate
DEG C, keep this temperature section calcining 4 hours, gained sample is Al-PILC.Sodium nitrate and niobium oxalate is molten in deionized water, match
It is 0.021mol/L sodium nitrate and 0.021mol/L niobium oxalate solution at concentration, loads aluminium pillared montmorillonite mass ratio (Na by Na
Wt%=7wt%), aluminium pillared montmorillonite mass ratio (Nb wt%=0.5wt%) is loaded by Nb, calculates gained concentrations above
Sodium nitrate solution and niobium oxalate solution are added in the above-mentioned aluminium pillared montmorillonite of 4g, are slurried presoma, 75 DEG C of stirring 4h, rotation
Turn to be evaporated to drying, 120 DEG C drying 24 hours, 400 DEG C of roasting 4h, obtained support type Na/Al-PILC compound adsorbent.
(2) a certain amount of adsorbent is placed in thermogravimetric instrument, is passed through CO by adsorbent of the present invention2(concentration is
10vl.%) and N2The gaseous mixture of (concentration 90vl.%), reaction temperature are 150 DEG C, adsorb to mixed gas, pass through matter
Amount variation detection adsorbent is to CO2Attached amount.This adsorbent adsorption capacity with higher under the above conditions.
Claims (4)
1. aluminium pillared montmorillonite loads Na-Nb compound adsorbent, which is characterized in that two kinds of elements compoundings of Na and Nb are carried on aluminium column
It supports on montmorillonite carrier, aluminium pillared montmorillonite is a kind of material being inserted into hydroxyl aluminum solutions between montmorillonite layer.
2. the aluminium pillared montmorillonite of claim 1 loads Na-Nb compound adsorbent, which is characterized in that element Na and Nb are carried on
Aluminium pillared montmorillonite specific surface area is 200~300m2/g。
3. the method for preparing aluminium pillared montmorillonite load Na-Nb compound adsorbent as claimed in claim 1, which is characterized in that including
Following steps:
(1) preparation of aluminium pillared montmorillonite carrier
By the H of natural smectite and 1.2~1.8mol/L2SO4Solution stirring in water bath 4~6 hours at 60-70 DEG C, wherein covering de-
Stone and H2SO4The ratio of solution is 1g:10ml, the montmorillonite filtration washing after acidification to no SO4 2-Until, use BaCl2Solution inspection
It tests, filtered sample 120 DEG C of dry 6h in drying box, ground 80 mesh sieve of mistake of sample after drying is covered up to acid is modified
De- stone.
Configure the AlCl of 0.1~0.3mol/L3Aqueous solution drips the NaOH solution of 0.1~0.3mol/L with the speed of 1mL/min
It is added in above-mentioned solution, [OH-]/[Al3+] molar ratio=2~3, temperature keep 50~70 DEG C, be subsequently agitated for 3~6 hours,
Resulting suspension aged at room temperature 12~24 hours obtains aluminium column liquid.
Above-mentioned acidified modified montmorillonite is added according to a certain percentage in deionized water, acidifying montmorillonite suspension slurry is made, acid
Change montmorillonite: mass ratio=1:40~80 of deionized water.The above aluminium column liquid is added dropwise to acidifying montmorillonite suspension slurry dropwise
In liquid, wherein [Al3+]: acidifying montmorillonite=4~10mmol:1g keep 60~70 DEG C of temperature to stir 10~16 hours, and room temperature is old
Change 12~24 hours, 100~120 DEG C of drying and grinding sievings are then put it into Muffle furnace, with 1~2 DEG C/min heating rate
300~450 DEG C are risen to, this temperature section is kept to calcine 1~4 hour, gained sample is aluminium pillared montmorillonite.
(2) rotary evaporation prepare compound adsorbent by aluminium pillared montmorillonite made above be added 0.019mol/L~
In 0.021mol/L sodium nitrate and 0.019mol/L~0.021mol/L niobium oxalate mixed solution, 60~75 DEG C of 1~4h of stirring,
The load capacity of middle Na is 1~15wt%, and the load capacity of Nb is 0.1~1wt%, and rotary evaporated to dryness is dry, 100~120 DEG C of dryings
12~for 24 hours, compound adsorbent is made in 400 DEG C of 1~4h of roasting.
4. aluminium pillared montmorillonite described in claim 1 loads Na-Nb compound adsorbent in CO absorption2Application in, feature exists
In: adsorbent is placed in thermogravimetric instrument, CO is passed through2Concentration is 5vl.%~15vl.% and N2Concentration be 85vl.%~
The gaseous mixture of 95vl.%, adsorbs it, detects adsorbent to CO by mass change2Attached amount, reaction temperature be 50 DEG C
~200 DEG C.
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